干旱区生态环境知识资源中心(Arid): 不同退耕年限干旱绿洲植被群落及灰棕漠土特性变化

Arid

	不同退耕年限干旱绿洲植被群落及灰棕漠土特性变化
其他题名	Variation of Oasis Vegetation Communities and Properties of Grey Brown Desert Soil Relative to History of "Grain for Green" in Arid Regions
	王理德; 田青; 郭春秀; 吴昊; 宋达成; 何芳兰; 何洪盛
来源期刊	土壤学报
ISSN	0564-3929
出版年	2021
卷号	58 期号:6 页码:1436-1447
中文摘要	为了探讨不同退耕年限对植被恢复及土壤特性的影响,选择民勤绿洲不同年代退耕地(1,2,4,8,13,20,30,40年)和耕地(对照CK)为研究对象,运用时空替代法,测定并系统分析其植被组成、土壤理化特性、土壤微生物特性和土壤酶活性。结果表明:在40年退耕地植被自然演替过程中,9个样地(包括一个CK)的所有样方中共出现43种植物,植被群落由一年生草本植物逐渐演替为单一的灌木,表现出较强的连续性与递进性。随着退耕年限的增加土壤含水率呈先降再升后降的趋势,总体呈倒"N"字型变化。土壤容重总体表现为逐渐减小;土壤粒径变化规律不明显,各样地细砂粒占比最大,黏粒最少;土壤全氮、速效钾、土壤有机质含量及土壤微生物量碳呈先上升后下降趋势,速效磷含量变化不明显,但是变化幅度较大;细菌与放线菌数量不同程度的减少,细菌是土壤中主要的微生物类群,最大数量达到611.46*10~5 cfu·g~(-1);土壤酶活性随退耕年限延长呈波动式下降。随着土层深度增加,土壤容重、土壤养分及土壤微生物总体表现为逐渐减小,表聚现象明显;通过退耕地聚类谱系图可以推断出退耕第4年是民勤绿洲退耕地恢复治理的关键时期。
英文摘要	【Objective】Effects of the implementation of the "Grain for Green" policy,relative to history,on oasis vegetation composition,soil physical,chemical and microbial properties,and soil enzyme activities were analyzed.【Method】To that end,plots of lands different in "Grain for Green" history(1,2,4,8,13,20,30 and 40 a)and a plot of farmland as CK in the Minqin Oasis were cited for exploration of effects of the practice on vegetation restoration and soil properties,using the spatial-temporal substitution method.【Result】 Results show that in the 9 plots(including CK),representing natural succession of vegetation during a period of 40 years,a total of 43 species of plants were observed,and the vegetation evolved gradually from a community of annual herbaceous plants to that of shrubs only,showing strong continuity and progressiveness.With the increase in age,soil moisture content declined first,then rose and declined again,appearing like an inverted "N" in variation trend,and was higher in the upper soil layer than in the lower layer in the plots over 20 years in age;soil bulk density decreased gradually on the whole;soil particle size composition did not show any regular trend in variation,and was dominated with fine sands rather than clay;soil total nitrogen,soil available potassium,soil organic matter and soil microbial biomass carbon all rose first and then declined in content,while soil available phosphorus did not change much in content,but did in margin;soil bacteria and actinomycetes decreased to a different degree in population;with bacteria being in dominancy and reaching up to 611.46*10~5 cfu·g~(-1);and soil enzyme activities fluctuated,but on a generally declining trend.Moreover,with increasing soil depth,soil bulk density,soil nutrient contents and soil microorganisms generally decreased,and the phenomena of surface accumulation was quite obvious.【Conclusion】The cluster pedigree chart of the plots demonstrates that the 4~(th)years after the "Grain for Green" practice was implemented are critical for the land to have vegetation recovered in the Minqin Oasis.All the findings in the experiment may serve as a practical and theoretical basis for conservation and restoration of ecosystems in arid oases.
中文关键词	植被恢复 ; 理化特性 ; 微生物特性 ; 退耕地 ; 民勤绿洲
英文关键词	Vegetation restoration Physicochemical properties Microbiologic properties "Grain for Green" land Minqin Oasis
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Environmental Sciences & Ecology
CSCD记录号	CSCD:7086991
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377970
作者单位	王理德, 甘肃农业大学林学院;;甘肃治沙研究所;;甘肃河西走廊森林生态系统国家定位观测研究站, ;;;;甘肃河西走廊森林生态系统国家定位观测研究站, 兰州;;兰州;;武威, 甘肃;;;;甘肃 730070;;730070;;733000, 中国.; 田青, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国.; 何洪盛, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国.; 郭春秀, 甘肃治沙研究所;;甘肃河西走廊森林生态系统国家定位观测研究站, ;;甘肃河西走廊森林生态系统国家定位观测研究站, 兰州;;武威, ;;甘肃 730070;;733000.; 吴昊, 甘肃治沙研究所;;甘肃河西走廊森林生态系统国家定位观测研究站, ;;甘肃河西走廊森林生态系统国家定位观测研究站, 兰州;;武威, ;;甘肃 730070;;733000.; 宋达成, 甘肃治沙研究所;;甘肃河西走廊森林生态系统国家定位观测研究站, ;;甘肃河西走廊森林生态系统国家定位观测研究站, 兰州;;武威, ;;甘肃 730070;;733000.; 何芳兰, 甘肃治沙研究所;;甘肃河西走廊森林生态系统国家定位观测研究站, ;;甘肃河西走廊森林生态系统国家定位观测研究站, 兰州;;武威, ;;甘肃 730070;;733000.
推荐引用方式 GB/T 7714	王理德,田青,郭春秀,等. 不同退耕年限干旱绿洲植被群落及灰棕漠土特性变化[J],2021,58(6):1436-1447.
APA	王理德.,田青.,郭春秀.,吴昊.,宋达成.,...&何洪盛.(2021).不同退耕年限干旱绿洲植被群落及灰棕漠土特性变化.土壤学报,58(6),1436-1447.
MLA	王理德,et al."不同退耕年限干旱绿洲植被群落及灰棕漠土特性变化".土壤学报 58.6(2021):1436-1447.